(2) Incandescent Red Stop Turn Tail Lights with Reverse and License Lights Each light has 3 mounting studs on the back side of the light which is also how the light is grounded. 3 wire leads for easy installation. Black-Reverse Light, Green- Tail Light, Red-Brake. These lights are tail lights and then get brighter for the turn signal / brake functions and also has the reverse light. The housing has a clear lens on the bottom for illumination of the license plate. DOT approved. 12 Volt.